If you are new to #mastodon, migrating from #twitter and you love to post videos, please consider posting your video over at a hosting site such as Youtube or Vimeo (others exist). Then post the link, it should show and play in your Toot.
It saves your server from having to store and stream huge quantities of extra data.
I'm going to add into here that federated hosting exists in the form of #peertube as well which is worth a look at. https://joinpeertube.org/
What is PeerTube? | JoinPeerTube

A free software to take back control of your videos! With more than 600,000 hosted videos, viewed more than 70 millions times and 150,000 users, PeerTube is the decentralized free software alternative to videos platforms developed by Framasoft

JoinPeerTube
@mojomoomoo I tried a YouTube link and it just left it as the URL. Is it supposed to embed it?
@Talltim see the below its from YouTube.
What are you using to access and post on Mastodon? Browser or app?
It could also be your instance which is under a lot of pressure. I just tried to access mastodon.online and it didn't open.
Does the video show?
https://www.youtube.com/watch?v=rvI3mgCMgfE
YouTube

@mojomoomoo I posted from the browser that time, safari on iOS. I can see the embedded YouTube link on your toot
@Talltim did you actually click publish? when you write the post you will just see the link like the attached image
https://youtu.be/ZcZMGx15QBU
but when you post it should populate. I ask because I cant see any post of yours with a video
The 9Barista Espresso Machine Review

YouTube
@mojomoomoo I think so, it’s this one https://mastodon.online/@Talltim/109375958683896866
It has a pic in as well which may stop the vid embedding, but I edited it in after as the YouTube didn’t embed. Thanks for the help by the way
Tim David (@[email protected])

Attached: 1 image Pretty much every morning I wake up with an ear worm stuck in my head. Sometimes it’s something I’d listened to the day before, but other times I have no idea where it came from. Anyway, here’s today’s https://youtu.be/APbaO8_b4Sw

Mastodon
@Talltim Yes I've since discovered you cant have a video and picture. Picture wins and video is demoted to link.
No problem.
Tim David (@[email protected])

Today I woke up to this.cos I heard a steel drum band playing yesterday https://youtu.be/nKhN1t_7PEY

Mastodon